package view;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

import com.thinkland.juheapi.demo.R;

public class SideBar extends View {

    private TextView dialogText;

    public SideBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }

    public SideBar(Context context) {
        super(context);
    }

    public void setTextView(TextView dialogText) {
        this.dialogText = dialogText;
    }

    private Paint paint = new Paint();
    private OnTouchingLetterChangedListener letterChangedListener;

    public static String[] sidebar = {"#", "A", "B", "C", "D", "E", "F",
            "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S",
            "T", "U", "V", "W", "X", "Y", "Z"};

    private int choose;

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        paint.setColor(Color.GRAY);
        paint.setTypeface(Typeface.DEFAULT_BOLD);
        paint.setTextSize(20);

        int height = getHeight();
        int width = getWidth();

//        System.out.println(height);
//        System.out.println(width);

        int each_height = height / sidebar.length;

        for (int i = 0; i < sidebar.length; i++) {
            float x = width / 2 - paint.measureText(sidebar[i]) / 2;
            float y = (i + 1) * each_height;

            canvas.drawText(sidebar[i], x, y, paint);
        }
    }

    public interface OnTouchingLetterChangedListener {
        public void onTouchingLetterChanged(String s);
    }

    public void setOnTouchingLetterChangedListener(
            OnTouchingLetterChangedListener onTouchingLetterChangedListener) {
        this.letterChangedListener = onTouchingLetterChangedListener;
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {

        final int action = event.getAction();
        final float y = event.getY();
        final OnTouchingLetterChangedListener listener = letterChangedListener;

        final int c = (int) (y / getHeight() * sidebar.length);
        switch (action) {
            case MotionEvent.ACTION_UP:
                setBackgroundResource(android.R.color.transparent);
                invalidate();
                dialogText.postDelayed(new Runnable() {

                    @Override
                    public void run() {
                        dialogText.setVisibility(View.INVISIBLE);

                    }
                }, 1 * 1000);
                break;

            default:
                setBackgroundResource(R.drawable.sidebar_background);

                dialogText.setVisibility(View.VISIBLE);
                dialogText.setText(String.valueOf(sidebar[c]));
                dialogText.setTextSize(TypedValue.COMPLEX_UNIT_SP, 34);


                if (c > 0 && c < sidebar.length) {
                    if (listener != null) {
                        listener.onTouchingLetterChanged(sidebar[c]);
                    }
                    choose = c;
                    invalidate();
                }
                break;
        }

        return true;

    }

}
